<template>
  <view>
    <my-search :bgcolor="'#C00000'" :radius="18" @myclick="gotoSearch" ></my-search>
    <view class="scroll-view-container">
      <scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh+'px'}">
        <block v-for="(item,i) in cateList" :key="i">
        <view :class="['left-scroll-view-item',i===active ? 'active' : ' ']" @click="activeChanged(i)">{{item.cat_name}}</view>
        </block>
      </scroll-view>
      <scroll-view scroll-y="true" :style="{height: wh+'px'}" :scroll-top="scrollTop">
        <view scroll-y="true" :style="{height: wh + 'px'}">
          <view class="cate-lv2"  v-for=" (item2,i2) in cateLevel2" :key="i2" >
            <view class="cate-lv3-list">
              <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
                <image :src="item3.cat_icon.replace('dev','web')"></image>
                <text>{{item3.cat_name}}</text>
              </view>
            </view>
            
          </view>
        </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins:[badgeMix],
    data() {
      return {
        wh:0,
        cateList:[],
        active:0,
        cateLevel2:[],
        scrollTop:0
      };
    },
    onLoad(){
    const sysInfo = uni.getSystemInfoSync()
    console.log(sysInfo)
    this.wh = sysInfo.windowHeight - 50
    this.getCateList()
    },
    methods:{
      //获取分类列表的数据
      async getCateList() {
       const {data: res } = await uni.$http.get('/api/public/v1/categories')
       if(res.meta.status !==200) return uni.$showMsg()
       this.cateList = res.message
      this.cateLevel2= res.message[0].children
      },
      activeChanged(i){
        this.active = i
        this.cateLevel2 = this.cateList[i].children
        this.scrollTop = this.scrollTop === 0 ?1 :0
      },
      gotoGoodsList(item){
        uni.navigateTo({
          url:'../../subpkg/goods_list/goods_list?cid=' + item.cat_id
        })
      },
      gotoSearch(){
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      }
      
    }
  }
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
}
.left-scroll-view{
  width:120px;

.left-scroll-view-item{
  background-color: #F7F7F7;
  line-height:60px;
  text-align: center;
  font-size: 12px;
  &.active{
    background-color: #FFFFFF;
    position: relative;
    &:before{
      content:'';
      display:block;
      width:3px;
      height: 30px;
      background-color: #C00000;
      position: absolute;
      top:50%;
      left:0;
      transform:translateY(-50%);
    }
  }
}
}
.cate-lv2-title{
 font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}
.cate-lv3-list{
  display: flex;
  flex-wrap: wrap;
  .cate-lv3-item{
    width: 33.33%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom: 10px;
      image{
        height: 60px;
        width: 60px;
      }
      text{
           font-size: 12px;   
              }
    
  }
}
</style>
